Lock



F. K. HEYER LOCK Aug. 28, 1928. 1,682,080

Filed Deq. 28; 1927 s Sheets-Sheet 1 (K/ I 1 1 1 INVENTOR ATTORNEY 1 11m '14 .IZAM

W INVENTOR ATTORN EY 0 8 2 0 t 2 e 8 m I m e e h S 3 F. K. HEYER LOCK Filed Dec. 28, 1927 7 19- Aug. 28, 1928.

Aug. 28, 1928.

F. K. HEYER LOCK Filed Dec. 28, 1927 3 Sheets-Sheet INVENTOR /4A Y ATTORNEY Patented Aug. 28, 1928.

UNITED STATES PATENT OFFICE.

FREDERIC K. HEYER, OF STAMFORD, CONNECTICUT, ASSIGNOR TO THE YALE & TOWNE MANUFACTURING COMPANY, OF STAMFORD, CONNECTICUT.

LOCK.

Application filed December 28, 1927. Serial No. 243,160.

This invention relates to looks, more especially hotel locks of the type in which two bolts are utilized, a lower bolt operable from the inside and an upper bolt operable from the outside. The outside bolt is controlled by a single cylinder lock, this lock being openable by a group of keys called lower order keys and a second group designated higher order keys or shut-out keys. All such locks have certain primary functions and itis the purpose of this invention to accomplish these functions in a simple and reliable manner.

One object of the invention is to provide a lock of the type in which the inside or lower bolt may be thrown by a thumb turn or cylinder look from the inside, and when so thrown will not permit retraction by a key of a lower order inserted from the outside of the lock. The lock is so constructed, however, that a key of higher order operated from the outside will withdraw the lower bolt even after that bolt has been thrown from the inside.

Another object is to provide a lock ofthe type in which the upper bolt, when thrown from the outside by a lower order key may be withdrawn by any of the various keys for which the lock is adapted.

A still further object is to provide a lock in which the outside bolt may be thrown by the higher order key, or shut-out key, so as to exclude admission into the room by all keys of lower order.

Afurther object ofthe invention is to permit retraction of the upper or outside bolt from the inside, regardless of which key was used to throw the same from the outside of the lock.

Hitherto, the above objects have been ac-. complished by having separate sets ottumblers for the inside and outside bolts, and having a lever connection between the two bolts, so that when the inside bolt was projected, it could only'be retracted from the outside by projecting the outside bolt to withdraw the inside bolt and then withdrawing the outside bolt. In order to do this, there is a tumbler connector between the inner and outer bolt tumblers, so that when the higher order keys are, used, the inside bolt tumblers are set. so that the inside bolt may be retracted, it being impossible to throw the outer bolt without retracting the inner bolt. 4* lock of the above type ft'ully dis closed by Voight inPatent1,2-21,ll5, April 3-, 1917. I

My invention eliminates the necessity for.

throwing the outer bolt when the inner bolt is required to be retracted, and doesaway with the need of any complicated systemof The principle under which my lock operates is the selective operation of one of a group of bolts by means of the selective psi tioning ot' a single sliding tumbler controlled by a series of cams operating on the same axis. The shut-out features are obtained by a slid ing mechanism, variously controlled by the high order cam, inside thumb turn cam, and the inside bolt.

In the drawings Fig. 1 illustrates a front view of my lock with the cover plate removed and the mechanism shown looking from the outside of the door. Fig. 2, is a front and side view of my sliding tumbler. Fig. 3 is a front view of an auxiliary tumbler. Fig. 4 is a view similar to Fig. 1, showing the lower or inside bolt projected. and the lower portion of the lock cut off. Fig. 5 is similar to Fig. 4 showing the upper or outside bolt projected. Figs. 4 and-5 are views of the sliding tumbler in its relation to the bolt fences of Figs. 4: and 5 under certain conditions. I F ig. 6 is a view similar to Figs. 4 and 5 showing the sliding tumbler and the shut, out mechanism removed. F ig. 7 is a rear view of the inside and outside bolts showing the mechanism adapted to prevent the operation of one bolt when the other bolt .is thrown a slight initial amount. Fig. 8 is a "front and side view of a shut-out lever forming part of the shut-out mechanism. Fig. 9 is a top and side view of the main shut-out slide. Fig. 10 is a top and side View of the follower lover of the shut-out slide. Fig. 11 is a view in elevation, showing the co-action of the inside and outside roll-backs withthe. tumbler de pressing mechanism. Fig. 12 is a view showing the relation of the shut-out lever and slide to the cams, the full lines representing the shut-out mechanism in its neutral position while the dotted lines show it in its shutout position.

'7 move, this bolt will be projected.

Referring to the drawings; reference numeral 20 represents the lock casing which is provided with a face plate or front 21 hav ing openings for the deadbolts 22 and 23 and the latchbolt 24. In Fig. 6, it will be observed that bolt 22 is provided with a rearward portion, 24; provided with the usual fence 25, and has a slot 26 therein, cooperating with a pin 27 fixed to the casing on which the bolt is adapted to slide. A spring 28 mount-ed at 29 on the casing cooperates with a lug 30 on the bolt to hold the same yieldingly in projected or retracted position. The lower or inside bolt, 23 is similarly provided with a rearward portion 2 1. a fence 25', and a slot 26 cooperating with pin 27 The spring 28 cooperates with a lug 30 on this bolt in the same manner as described above.

Each of bolts 22 and 23 is provided with a pin 31, serving'as a hearing or fulcrum for the toggle lever 32 which is pivoted on the pin 34: of the bolt operating slide 33. The pin 34 extends through the slide 33 and cooperates with a rectangular groove 35 on the rear casing plate which serves as a bearing for the slide (Fig. 6). On the left hand portion of the slide there is a slot 36 cooperating with a pin 37 carried by the casing for the same purpose. Talons 38 and 39 are provided for the slide to serve as means for projecting or retracting the same. Each of the cams to be described later, cooperates with these talons in the usual and well-known manner. A tumbler actuator 40 is carried by t e pin 34 of the slide and is spring pressed by the spring 11 in an upward direction, limited by the projection 39 of talon 39. This tumbler actuator has a portion 4-2, which is adapted to be operated in various ways by the cams in a manner to be described later.

The action of the bolts 22 and 23 and the bolt projecting slide 33 is as follows. The particular cam acting on the talon 39 to pro iect the slide 33 will tend to move the same in a right hand direction looking at Fig. 6. A selective sliding tumbler, to be described later, isadapted to prevent the movement of one or the other of the bolts 22 and 23 by cooperation with the fence of one of these bolts. It, therefore, the bolt 23, for instance, be prevented froin movement, it will observed that the projection of the slide 33 will tend to move the lever 32 about the pin 31 of fixed bolt 23 as a fulcrum, and since the bolt 22 is free to Similarly, if the bolt 22 were prevented from movement, the projection of the slide 33 would tend to rotate the toggle lever about the upper bolt pin 31 as a fulcrum and would then project the lower bolt 23.

Referring now to Figs 1-5, inclusive, and more particularly to Fig. 2, there will be found illustrated the selective sliding tumbier 413, which is equipped with slots 44: and 4.5. By means of those slots which cooperate with the pins 46 and 4:7 lined to the rear lock plate, the slide is adapted to move in a vertical direction'with respect to the bolts 22-and 23. A spring 48 cooperates with a lug &9 on the slide and keeps the san'ie'firmly pressed to its uppermost position (Fig. 1). Anarm 50 is provided for the sliding tumbler, this arm 59 res .g normally under the lug 42 of the tumbler actuator elO. Thus, when the tumbler actuator 42 is depressed, by any of the came it will acton the arm 50 to dcpre'ts slide 13 against its spring 48 to a selective position. The slide 43 is equipped with gatings 51 and 12, which cooperate with the fences 25 and 25 of the upper and lower bolts respectively. Auxiliary tumblers 53 and 5 1 are piv otally mounted at points 55 and 56 on the sliding tumbler, and are spring pressed by springs 57 and 58 in a direction to limit the openings of the gatings. Pins 59 and 60 are adapted to limit the movement of these auxiliary tumblers.

The lock is provided with three cams, (Fig. 11) although it should be understood that more may be used in case of necessity. The first cam is that one which is actuated by the inside thumb turn, and is designated by refercnce numeral 61. The remaining two cams are do?" rated 62 and 63 and are adapted to be opera l by the cylinder lock 64 and a plu rality or different keys of lower and higher order. The cylinder lock is of the type described in the VoightPatent 857,126, June 18, 1907, in which the two rollbacks are adapted to be operated together by a so-called master or shut-out key and in which the outer cam 62 alone is adapted to be operated by a lower order key such as a guest, maids or housekeepers key.

Referring more particularly to Fig. 11 itwill be observed that the portion 65 of the tumbler actuator bar 42 is sli htly cut away. whereas the portion 66 is slightly raised. It is this slight difference in elevation of the parts 65 and 66 which gives the selective action of the sliding tumbler l3. By means of this selective action, the tumbler 13 will be depressed a slight extent when actuated by the thumb turn cam 61 and will be depressed to a greater extent when operated upon the cams 62 and 63.

Referring now, more particularly to Fig. 1, it will be observer, that when the thumb turn cam 61 is o 'ierated in a counter-clockwise direction it will depress the part 42 of the turnbler actuator 40 which will in turn operate on the arm 50 of the tumbler 13 to lower the same a slight extent. sufficient to bring the gating 52 as limited by tumbler 5 1 opposite the fence 25 of the bolt 23. It will be insuliicient, however, to bring the gating 51 below the lower face of fence 25 of the bolt 22. Further operation of the rollback 61 will bring the same against the talon 39 of the projecting slide and fin This slight lowering will be ion thermovement of-the same .will'act to rotate the toggle leverabout the-stationary bolt pin 31 of-the upper bolt 22 as ait'ulcrum and will project the bolt.23 as shown in Fig. 4.

Referring again to Fig. 1, if it be desired to project the upperbolt 22 the outside cams 62an-d 63' are actuated by the proper key. These cams will act eithertogether or the cam 62 alone to depress the portion 42 of the tumbler actuator 40 a greater amount than when .itw'as acted upon by the roll back 61 and consequently the sliding tumbler 43 will be depressed a greater amount. This will cause the portion 62 of the auxiliary tumbler 54to be positioned opposite the lower bolt fence 25 while the upper bolt'fence 25 will now be relatively positioned'above the uppermostiportion 63 of the upper auxiliary tumbler 53. In this position, when the rollbacks propel the sliding bolt projecting member 33 through talon 39, the toggle lever 32 will be revolved about'31 oflower bolt 23 as its fulcrum and the bolt 22 will be projected as shown in Fig. 5.

The function of the auxiliary tumblers 53 and 54 willnow be explained. These tumblers are provided to permit the retraction of the lower bolt from the outside of the lock by the use. of a master key and also to permit the retraction of'the upper bolt from the inside ofthe look by means of the thumb turn cam 61, so that no one'could possibly be lockedwithin the room. Referring now to Fig. .4, where the lower bolt 23 is shown projected it willbe observed that the fence 25 rests behind the jaw 64 of the gating 52. If it now be desired to retract the bolt 23 from the outside of the lock, the cams 62 and63 will not be able to position the gating 52 of the sliding-tumbler 43 exactly opposite the fence 25 because it will be remembered that the outside cam willact to lower the tumbler tothe pointwhere the upper bolt may be projected However, the operation a of the cams will force the tumbler 43 downward to a point where the fence 25 will restopposite the angular face 65 of the auxiliary tumbler 64 asv shown in Fig. 4 and further operation of the cams will cause the same to retract the sliding bolt operating number 33. The toggle lever 32. will then revolve about the fixed-pivot 31 of the upper bolt 22, and will tend to force the bolt: 23 in a iearward direction. The fence 25 will then slide against the inclined surface 65 and cam the auxiliary tumbler upward against its spring 58 so as to permit the bolt 23 to be retracted.

Similarly, with reference to Fig. 5, when it is desired to retract the upper bolt 22'from the inside of the lock, the cam 61 will be unable to lower the sliding tumbler 43 to the position where the uppermost portion 63 of the tumbler 53 will be at. the level of the lower face of'thefence 25; However, the

rollback 61 will be able to lower the tumbler 43 until the fence 25 will be opposite the upper portion of the inclined surface 66 of the auxiliary tumbler 53 (Fig. 5*). Thus, the bolt 22 will be permitted to be retracted due to the action of the fence 25 against the surface 66 of the spring pressed tumbler in the same manner as explained above with reference to the lower bolt.

Referring, now to Figs. 1, 4, 5 and more especially 8, 9 10 and 12 I have illustrated the novel shut-out mechanism which is an important part of my invention. This shut-out mechanism is composed of three parts, illustrated in the Figures 8, 9 and 10. The main part is shown in Figure 9, being designated by reference numeral 67, and is called the shut-out slide. It is equipped with the lugs 68, 69 and 70 by means of which it slides on the casing bottom of the lock. A slot 71 cooperates with a pin 72 which is fixed to the casing bottom of the lock and acts to limit the movement of the slide 67. A pin 73 is carried by the slide and mounted on this pin is the shut-lever 74. This lever is spring pressed by means of spring 76 in a direction to bring its shoulder 75 against the end 75 of the raised cam portion 76 carried by the slide 67. his shut-out lever 74 is equipped with a pocket 77 having a rectangular end portion 78 which is adapted to prevent the full rotation of the outside lower order cam 62 under certain conditions to be described later.

In the arrangement of these members, the pivoted lever 74 will lie so that its pocket 77 will be in the plane of the cam 62, while the sides 88 of the pocket will lie in the plane of the cams 61 and 63 of the thumb turn and higher order keys respectively. Similarly, the shut-out slide will be so positioned that its extending cam portion 76 will lie in plane of cam 63, (Fig. 12) while its lug 87 will lie in the plane of the cam 61. The cam 62 rotates free of the slide 67 under all circumstances, while the cam 61 cooperates with lug 87 and cam 63 cooperates with the part 76 under conditions to be described later.

The third member of the shut-out assembly is shown in Fig. 10, and it is called the follower mechanism since it follows the movement ofthe slide 67 and limits the same. This follower member is designated by numeral 79 and is equipped with a bearing 80 by means of which it is mounted on the pin 37, which serves also to guide the bolt projection slide 33 as heretofore described. Member 79 is further equipped with an car 81 having a face 82 which cooperates with a lug 83 on the slide 67. Referring more particularly to Figs. 4 and 5, it is seen that the lower bolt 23 has an upstanding lug member 84 having a cut-away portion 85 which cooperates with 79 and as a limiting part therefor.

In Fig. 1., the shut-out mechanism is shown Jim in its neutral position.- It will be observed that a spring 85 acts on the slope S6 of the portion 76 of the slide and this spring tends to move the slide both in a downward pat and in a path to the right of its position shown in Fig. 1. The lug 83 acting against the face 82 will serve to force the follower lever 79 against its bearing in the lug 84; of the lower bolt, all of which is shown in Fig. 1.

If, at this point it is desired to throw the upper bolt by means of the lower order key from the outside of the lock the cam 62 alone will be actuated. This cam (32, being located out of the plane of the portion 76 of the deadlocking slide 67, will therefore rotate freely (ill of the same and will actuate the portion 12 of the tumbler actuator 40, the talon 39 of the bolt projecting slice 33, and will project the upper bolt 22 in a manner already described. In other words, it will in no way affect the position of the deadlocking slide, nor will it be obstructed in its movement by the same when the slide and lever are in their neutral position shown in Fig. 1 and in full lines in Fig. 12.

-f, however, it be desired to throw the upper bolt by means of the emergency or shut-out key, then both earns 62 and will be operated in a manner fully described in the Voight patent referred to with reference to the cylinder locl: 64. The initial position of these two cams, 62 and 63 is upright as shown in Figs. 11 and 12 while the thun'lb-turn cam is originally in a horizontal position.

Rotation from this initial position to the left, looking at Figs. 1 and 12, will bring cam 63 opposite the inside surface 86 of the raised cam portion 7 6 of the shut-out slide 67, and will move the same to the left. This movement to the left will cause the lug 83 to pass beyond the surface 82 of the follower member 79 and the spring 85 will cause a downward moven'ient of the slide so as to bring the lug 83 behind the ear 81, as shown in Fig. 5. In this position, the slide is now in a lower position than in Fig. 1 and the shut-out lever 7 1 is now positioned in the plane of rotation of the several, cams. This relation of the parts is shown in the dotted line position of Fig. 12. Further movement of the cams serves to project the upper bolt in the usual manner.

If it now be desired to retract the bolt 22 from the position of Fig. 5, the change key will be inoperative to do so, since the cam 62 n operated alone to the right from its init l upright position of Fig. 12 will move into the pocket 77 against the rectangular end 78 of the shutout lever 7 1, and will be restrained from further movement. Operation of the emergency key will not, however, be pre vented, since the emergency key willoperate' both cams 62 and 63, and cam 63 cooperates with one of the surfaces 88 of lever 7 1 to cam lever 74: upward against its spring 76 and out of obstructing position. Further rotation of the cams will cause cam 63 to act on the upper portion 87 of the cam portion 7 6 to move the slide (iZupward against the pressure of spring 85 so as to bring the lug 83 above the ear 81,

to permit the spring 85 to force the slide to the right from its position in Fig. '5 to its original neutral position, shown in Fig. 1.

Referring again to Figs. and 12, the shutout nieehanisn'i will be ineffective to prevent the retraction of the outside bolt 22 from the inside of the look by means of the thumb turn cam (31. This cam 61 when rotated clockwise. it will be observed, will strike the surface 87 of the slide (37. before entering the plane of the shut-out. lever 74, and will cause the slide to move upward to be acted upon by the spring 85, so as to carry the same to its neutral position as was the case in regard to the cam 63. Further rotation will, of course, act to retract the upper bolt by means of the yielding action of auxiliary tumbler 53 as has already been explained.

is has been previously indicated, it is desirable to shut out the lower order of keys from the outside of the look when the lower bolt is thrown-from the inside of the lock. Referring more particularly to Figs. 1 and 4: it will be observed that when the lower bolt 23 is thrown from the inside by the cam 61 tnat the lug member 84 is moved to the right and er1nits the spring to act upon the slide 67 and force the same in a downward path so that the lug 83 will follow the surface 82 of the follower member 7 9 to the point in dicated in Fig. 4. This will be sufficient to bring the shut-out mechanism to its lowered position (Fig. 12) where outside lower order cam 62 will upon movement to retract the bolt enter the pocket 77 of the shut-out lever 74.

In this position of Fig. 4 the shut-out slide will be inoperative, however, to preventthe retraction of the lower bolt by the emergency key. The emergency cam 63 will lie in the plane of the side 88 of the pocket 77 and will serve to turn the lever 74; against the action of the spring 76 out of its path, and its further rotation to the right will Serve to act upon the talon S8 to retract the bolt as pre: viously described. Still further rotation will act upon the surface 87 to bring the deadlocking slide to its neutral position ashas been previously set forth.

The general operation of my device should be clear from the foregoing explanation but I shall now set forth briefly the general mode of operation to further clarify the same.

Anti-clockwise rotation of the inside cam 61 from the initial position of Fig. 1 will operate tumbler actuator 12, tumbler 13, slide 33, talon 39 and toggle lever 32 to project the lower bolt Simultaneous with this projectio the lug Set of the bolt moving to the .t permits the shutout ha nism to be moved by spring to shut-out position illustrated in Fig. 4; and shown in dotted lines in Fig. 12.

In the above arrangement of parts, operation by the lower order cam 62 to retract inside bolt 23 will be impossible since the shut out lever 74 will prevent movement in a clockwise direction as shown in Fig. 12.

In the'arrangement of parts, the operation of the cams 62 and 63 together by the shut-out key or higher order key will be effective. however. Clockwise rotation of the cams from Fig. 12 will cause cam 63 acting on surface 88 tomove lever 74 out of the path of cam 62. Further rotation will cause the cams to set the tumbler 43 toits position of 4 and then actuate slide 33 through its talon 38 to retract the lower bolt, this action being possible due to the action of the auxiliary tumbler 64. Still further rotation will cause cam 63 to act on surface 87 to restore the shut-out mechanism to its neutral position.

Anti-clockwise rotation of the shut-out or higher order key from the initial position of Figs. 1 and 12 will cause the projection of bolt 22 in the usual manner and will also cause cam 63 to strike surface 86 of the shutout slide to move the same to shut-out position as shown in Fig. 5.

In this arrangement of parts, operation of the lower order cam will obviously be prevented by the shut-out mechanism.

The inside cam 61 is, however, able to restore the parts to their initial position. This cam when rotated clockwise from Figs. 5 and 12 first acts on surface 87 of the slide 67 to restore the shut-out mechanism to neutral position with the lug 83 behind the ear 81 of the follower 79. Further rotation will set the tumbler 43 to its position of Fig. 5 and due to auxiliary tumbler 53, the further action of the cam 61 on the talon 38 of the slide 33 will serve to retract theupper bolt 22.

Operation by the lower order cam is of course possible only when the shut-out slide is in the neutral posit-ion of Fig. 13. The bolt 23 when thrown by cam 62 can be retracted by operation from the inside or by any key which will operate cylinder lock 64 from the outside.

The latch mechanism for operating the latch bolt 24 is of the usual type well known in the art and since it does not form part of my invention, it is unnecessary to describe it.

In Fig. 7 is shown a safety device intended to hold one bolt firmly in retracted position when the other bolt is projected a slight amount.

A lever 90 is pivoted at 91 to the bottom of the casing 20. A lug 92 is carried by the bolt 22 on its under side while a similar lug 93 is carried by bolt 23. The lever 90 has a portion 94 which is adapted to cooperate with lug 92 and flat portion 95 which cooperates with the lug 93 in a manner now to be described.

Should bolt 22 be thrown, its lug 92 will actuate lever 90 through its connection at 94 and cause the same to rotate on its pivot 91 so as to bring the face 96 in front of lug 93. Obviously such action would prevent any forward movement of bolt 23. Similarly, if bolt 23 is thrown, the lug 93 will move to rest under the face 95 of lever 90. Obviously, the

lever 95 will then be rest-rained from rotary movement and will, through its connection with lug 92, prevent any movement of bolt 22.

lVhile I have shown a particular modification of my invention, I do not wish to be lim ited to the same since modifications of my invention will be obvious to one skilled in the art.

I claim:

1. A look comprising two bolts, a single selective mechanism for controlling the operation of said bolts, and a plurality of aX- ially alined cams adapted to operate said selective mechanism.

2. A look having a plurality of bolts, selective means for operating any one of said plurality of bolts, and a plurality of cams to variously actuate said selective means to operate a desired bolt.

3. A lock having a plurality of bolts, a single operating means to operate selectively any one of said plurality of bolts, a plurality of cams adapted to be operated variously to actuate said operating means, and tumbler mechanism selectively set by said cams to determine which of said plurality of bolts is to be operated by said means.

4. A lock having a plurality of bolts, a single means for operating a selected one of said plurality of bolts, key operated means for ac.- tuating said means, and means selectively positioned by said kej} operation to determine which of said bolts is to be operated.

5. A lock having a pluralityof bolts, a single means for operating a selected bolt of said plurality, a plurality of cams for operating said means, and means selectively positioned by said cams during their operating movement to determine the bolt to be operated.

6. A look having a plurality of bolts, means for projecting or retracting a selected one of said plurality of bolts, a plurality of cams selectively operated to actuate said means, and means selectively positioned by operation of said cams to determine which of said plurality of bolts shall be actuated by said projecting and retracting means.

7. In a lock, a plurality of bolts, bolt operating mechanism, a single tumbler mechanism, means to actuate said bolt operating mechanism and selectively position said tumbler mechainsm to operate predetermined bolts of said plurality.

8. In a look, a pair of bolts, a bolt operating slide, a toggle lever pivoted to said slide and to each of said bolts, tumbler mechanism adapted to be selectively positioned tuating said bolt operating slide and selectively positioning said tumbler mechanism.

I 10. In a lock, a plurality of bolts, a single bolt operating device, tumbler mechanism, and means adapted to simultaneously actuate said bolt operating device and selectively position said tumbler mechanism to operate a predetermined one of said plurality of bolts,

11. In alock, a pair of bolts, a bolt operating slide, a lever pivoted near its mid point to said slide, and at its ends to each of said bolts a tumbler mechanism coo eratin with v 7 23 said bolts to permit projection of one while maintaining the other retracted, selectively operated mechanism to actuate said bolt operating slide and position said tumbler mechanism to permit projection of one of said bolts by-sa'id slide and lever;

' 12. A look having an upper and a lower bolt, a bolt projecting member, fences on said bolts, a sliding tumbler having a pair of gatings, a cam for positioning said tumbler to present one of said gatings to said upper bolt fence while the other of said gatings is displacedrelatively to said lower bolt fence, a cam for positioning said tumbler to present the second of said gatings to the lower bolt fence While the first gating is displaced relatively to said upper bolt fence, said cams being arranged to selectively position said sliding tumbler and operate said bolt projecting member to project the one of said bolts opposite whose fence a tumbler gating is positioned.

13. In the combination of claim 12, a pair of jaws constituting each of said' tumbler gatings, one of said jaws being fixed against movement in' one direction and yieldable in the other d'irection'whereby the retraction of either said upper bolt or said lower bolt is possible when the flexible jaw of a gating is positioned opposite a fence of said'bolts.

14:- In a lock,a pair of bolts, a bolt operating slide, a toggle lever pivoted to said slide and to each of said bolts, a tumbler, gatings in said tumbler and fences on said bolts adapted to cooperate with said gatings to control said bolts, a plurality of cams to actuate said bolt-operating slide and selectively position said tumbler, said tumbler when selective positioned being adapted to permit projection of one of said bolts by the slide and toggle lever while preventin projection of the other of said bolts, the toggle lever pivot of said stationary bolt being adapted to act as a fulcrum for said toggle lever.

15. In a lock, a shut-out slide, a bolt, afollower element positioned between said slide and bolt, means for causing the slide and follower to move with the bolt, said slide being adapted to move to shut-out position when the bolt is thrown.

16. In a lock, a shut-out mechanism adapted to prevent operation of certain keys, a pair of bolts in said lock, cams for operating each of said bolts, means controlled by one of said bolts adapted to move said mechanism to shut-out position when said bolt is thrown, said mechanism being also adapted to be moved into shut-out position by one of said cams when the other of said bolts is thrown.

17. In a lock, a pair of bolts, a cam for projecting one of said bolts, a lower and a higher order cam operable together or said lower order cam alone for projecting the other of said bolts, shut-out mechanism to block operation by said lower order cam, means to move said shut-out mechanism to shut-out position actuated by projection of said first bolt, or by projection of the second bolt by the combined lower and higher order cams.

18. In a lock, a'pair of bolts, a plurality of cams for operating said bolts, shut-out mechanism, means controlled by one of said bolts for setting said shut-out mechanism when said bolt is thrown by one of said cams, said shut-out mechanism having means cooperating with another of said cams whereby the latter will set the shut-out mechanism while projecting the other of said bolts, each of said cams being arranged to restore the shut-out mechanism to initial position when the same has been set by operation of the other.

19. In a look, a pair of bolts, meansoperable by a cam for projecting one of said bolts, lower and higher order cams operable together orsaid lower order cam alone for operating said means to project the other of said bolts, shut-out mechanism for said lower order cam, means to move said shut-out mechanism to shut-out position upon projectionof said first bolt, or upon projection of the second bolt by the combined lower and higher order cams, said shut-out mechanism being adapted to be reset by reverse operation of either said first mentioned cam or said pair of cams.

20. In a lock, a pair of bolts, a plurality of cams for projecting said bolts, shut-out mechanism, and means for moving said mechanism to shut-out position upon the projection of one of said bolts and a projection of the other of said bolts by predetermined cams of said plurality.

21. In-a look, a pair of bolts, means operable by a cam for projecting one of said bolts, a pair of cams operable together, or a particular one of said pair alone, to actuate said means to project the other of said bolts, said means including a tumbler, and means on said tumbler to permit retraction of either bolt by said first mentioned cam or said pair of cams.

22. A lock having a lower and an upper bolt, a bolt projecting slide adapted to operate either of-said bolts, a sliding tumbler having means cooperating with said bolts whereby one bolt is held from movement when the other bolt is released by said tumbler, a cam for positioning said tumbler to release the upper bolt, a second cam operative to position said tumbler to release the lower bolt, said cams being adapted while positioning said tumbler to actuate said bolt projecting slide to project the particular bolt released by the tumbler.

23. A lock having a lower and an upper bolt, a bolt projecting slide, fences on said bolts, a sliding tumbler having a pair of gatings, a cam for positioning said tumbler to present a gating to the upper bolt fence, a pair-of cams for positioning said tumbler to present a gating to the lower bolt fence, said first mentioned cam and said pair of cams being adapted to act on said bolt projecting slide while positioning the sliding tumbler to project the one of said bolts opposite whose fence a tumbler gating is positioned.

24:. In a lock, a pair of bolts, means operable by a cam for projecting one of said bolts, a pair of cams operable together to actuate said means to project the other of said bolts, said means including a tumbler, and means on said tumbler to permit projection of each of said bolts by selective operation of its particular cam or cams and retraction by either said first cam or said pair of cams.

25. In a look, a bolt, a bolt projecting member, a tumbler for controlling said bolt, a gating in said tumbler cooperating with a fence on said bolt, said gating having a jaw which is yieldable in a direction opposing the retraction of the bolt but is fixed relatively to the projecting direction of said bolt whereby the bolt may be projected by said projecting member only when the gating is opposite the fence but may be retracted when the gating or the flexible jawis opposite the fence.

26. In a lock, a pair of bolts, a sliding tumbler provided with gatings for cooperation with fences on said bolts, means including said tumbler operable by a cam for projecting one of said bolts, a pair of cams adapted to be operated together, or a particular one of said pair alone, to actuate said means to project the other of said bolts, said tumbler gatings having yieldable means whereby either said first mentioned cam or said pair of cams, will actuate said bolt operating means to retract the bolts.

27. A lock having a pair of bolts, fences on said bolts, a tumbler having a pair of gatings cooperating with said fences to control said bolts, a group of cams operable selectively to position said tumbler within a predetermined range to present a gating to a selected bolt fence whereby to permit projection of the bolt while holding the other bolt retracted, and a yielding jaw on each of said gatings whereby the tumbler is inoperative to prevent retraction of either of said bolts within the range of movement imparted said tumbler by the cams.

28. In a lock, a pair of bolts, means for op erating said bolts including a bolt actuating slide adapted to actuate either of said bolts and a tumbler adapted to be selectively positioned to select the bolt to be ope 'ated, a cam to position said bolt selecting tumbler and to operate said slide to project one of said bolts, a pair of cams for positioning said selective tumbler and operating said slide to project the other of said bolts, and means on said selective tumbler cooperating with said. bolts to permit retraction of either of said bolts by said first mentioned cam or said pair of earns.

29. A sliding tumbler, a gating therein, a bolt having a fence cooperatin with said gating, said gating having a pair of jaws through which the fence is adapted to pass, one of said jaws being yieldable a slight extent in one direction.

30. A sliding tumbler, a gating therein, a bolt having a fence cooperating with the gating, said gating having one fixed and one yielding aw.

31. In a lock, a tumbler, a gating therein, a bolt having a fence cooperating with said gating, said gating having a yielding aw.

32. A sliding tumbler, a gating therein, a bolt having a fence cooperating with said gating, said gating having an opening wider than said fence, a spring pressed auxiliary tumbler mounted on said sliding tumbler and adapted to narrow said opening to the width of the fence, said auxiliary tumbler being adapted to prevent movement of the bolt in a projecting direction except when the narrow opening is positioned opposite said fence, said tumbler being movable against its spring by the fence when the bolt is moved from a projected position in a retracting direction to permit boltmovement in a retracting direction when the fence is positioned opposite either said tumbler or gating.

83. In a look, a pair of bolts, a blocking lever, a connection between said lever and one of said bolts whereby when said bolt is proj ected it moves the lever to block the projection of the other bolt, and means on said second bolt movable when said bolt is thrown to lock said lever to block said first mentioned bolt.

34. In a look, a pair of bolts, holding means to prevent projection of either of said bolts, and means on each of said bolts cooperating with said holding means to actuate the same to hold one of said bolts when the other is projected a slight amount.

35. A lock having a plurality of bolts, selective means for operating any one of said plurality of bolts, and a plurality of cams to variously actuate said selective means to operate a desired bolt, said means being adapted to operate said desired bolt independently of the remaining bolts constituting said plurality.

36. A lock having a plurality of bolts, a single operating means to operate selectively one of said bolts, a plurality of cams adapted to be operated variously to actuate said operating means, and tumbler mechanism selectively set by said cams to determine the bolt to be operated by said means, said operating means being adapted to operate the selected bolt independently of the remaining bolts constituting said plurality.

37. In a look, a plurality of bolts, means for projecting or retracting a selected one of said bolts, a plurality of cams selectively operated to actuate said means, and means positioned by operation of said cams to determine which of said plurality of bolts shall be actuated by said projecting and retracting means, said last named means being adapted to operate the selected bolt independently ol the remaining bolts constituting said plurality.

38. In a look, a pair of bolts, a bolt operating slide, a lever pivoted to said slide and to each of said bolts tumbler mechanism adapted to be selectively positioned to control said bolts, and means for actuating said bolt operating slide and lever and selectively posi tioning said tumbler mechanism to operate a predetermined one of said bolts, said operating mechanism being adapted to operate said predetermined bolt independently of the other bolt.

Signed at Stamford, in the county of Fairfield and State of Connecticut, this 23rd day of December, A. D. 1927.

. FREDERIC K. HEYER. 

